POSITIONS OCCUPIED

• Professor of Physics, UNESP - São Paulo State University, Institute of Theoretical Physics, São Paulo, SP, Brazil 1991-present
• Research Fellow 1A, CNPq, Brazil, 1992-present
• Associate Professor of Physics, Federal University of Pernambuco, Recife, PE, Brazil 1976-1991
• Post-Doctoral Fellow, School of Mathematics, University of New South Wales, Sydney, Australia 1973-1976, Adviser: Prof. Ian H. Sloan 

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